3）以平衡线及操作理线论作梯级：x*?y??（??1）y?y2.50?1.50y?????（1）?????（2）y?1.685x?1.369?10?3计算理论梯级顺序据与如数下：（1）（2）（1）（y1?xD?0.36）???（x1?0.1837）???（y2?0.3083）???(2)(1)（x2?0.1512）???(y3?0.2534)???(x3?0.1195)(2)???(y4?0.2000)(x5?0.06630)(x8?0.02253)(1)(2)(1)???(x4?0.09091)???(y5?0.1518)???(2)???(y6?0.1112)(1)(2)???(x6?0.04766)???(2)(1)???(y8?0.05449)???(1)(2)???(x9?0.01496)???(1)(y7?0.07894)???(x7?0.03315)(2)???(y9?0.03659)(1)(2)(1)(y10?0.02384)???(x10?0.009674)???(y11?0.01493)???(2)(1)(2)(x11?0.006026)???(y12?0.008785)???(x12?0.003533)???(1)(y13?0.004584)???(x13?0.001839)
?NT?12?(3.533?2)?12.9块3.533?1.839